Clutch



April 24, 1945. N. B. HAusMAN CLUTCH Filed April 14, 1944 `Patented Apr. 24,` 1945 UNITED STATES PATENroFFIcE i 2,374,542A f oLUTcH i i e Ward Hausman, Philadelphia., Pat.` .a e vApplication April 14, `1944, Serial `No.153'1l080 3 claims. "(01. isz-67) t My invention relates to anew and useful clutch and more particularly theA combination of a clutch and speed reducer contained in one gear box.;

One of the objects of rny.` invention is to provide a simple and'elfective means for selectively and positively transmittingmotion from a driving mechanism to a driven mechanism.

Another Aobject of this invention is to construct acombination4 clutch and speed reducer including a gear free ona driven shaft and carrying a spring pressed pin to be 'engaged by a slidable clutch element keyed to the above mentioned driven shaft and means to shift the `slidable clutch element.

Another object of the invention is to provide a clutch comprising a driven clutch member re volvably mounted on adriven shaft, `a slidable clutch` element movable longitudinally of said driven shaft, and a shifting means consisting of a rocking lever and a cam lever.

A further object of `the invention is `to provide a unique shifting means comprising a rocking `lever` swingingly mounted on an edge of the gear box and having a cam! lever pivoted tothe rocking lever and coacting with `said gearbox to swing said rockinglever inone direction.

A still further objectof the invention is to provide a device of the .character mentioned consisting of a gear box into which projects a driving shaft having a Worm xed thereon and meshing with a worm gear revolvably mounted on a driven shaft extending through the gear box, said worm gear carrying a spring pressed pin to engage a slidable clutch element keyed to said driven shaft and movable by a shifting means consisting of a rocking lever swingingly mounted on an edge of thehousing and provided with a right angle arm overlying a wall of said gear box to which rocking lever is pivoted a cam lever cooperating with the gear box to swing the rocking lever in one direction,the latter being urged in the vopposite direction by a. spring between the slidable clutch element and the Worm gear.

With the above and other objects in view, this i-nvention consists of the details of construction and combination of elements `hereinafter set forth and then designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, I will describe its construction in detail, referring my numerals to the accompanying drawing forming a part hereof, in which:

Fig. f 1 `isa Seemann narration or the clutch on the line IQ-I" oiFig. '3 and showingit'in a re'- leased position: i l

Fig. 2 is a similar view of the `clutch shown f in'anv engaged position. Y Fig'. Bis aview on the line 3-3 of Fig. 1.

Fig.'4is `an exploded view in perspective of the slidable "clutch element and its shifting means! Fig. 5 is a fragmentary sectional viewof the y"two" clutch `elements engaged and illustrating certain details ofconstruction.

In carryingout my invention as herein embodied Irepresents a gear' box or housing including a `body II' open at one endand preferably of f circularTormation with ai reduced offset portion I2. mrIhe open end of the body Il is normally closed by "a cap or cover I3 having a Y e rib I4 projecting from its inner surface to'assist in centering said" cover which is held' inplace byfastening devices I5, such asscrews. Both the body II and the cover VI3 may have a boss It to 'provide extended bearings for thedriven shaft `I1`Which passes through the gearboxl and has Itya keyway I8 formed thereinnv The 'driven shaft I I1 may `beheld againstlongitudinal movement inone direction by a collar I9 ixedthereon.`

Onthe drivenshaft I1 within the body of the gearbox is revolvably `mounted a worm gear 20 thathas a hub 2| tobear against the inner surface of; theend Wallof said gear box .bodyr-I This wormrgearZIl meshes.r witha Worm. 22 located in the reduced offset portion I2 of the gear box and xed to the driving shaft 23 which projects through said reduced portion and may be journalledin bearings 24 mounted inthe opposite side Walls of said reduced portion. The driving shaft 23 receives its motion from any suite able source of power. i

A pin 25 is slidably mounted on the gear and projects entirely through said gear `so that an end of said pin extends beyond the inner face of the gear and said pin is constantly urged for- Wardly by a spring 26. Preferably this spring is a at arcuate one having an end anchored at 21 to the outer face of thegear with the pin 25 xed to the freelend of said spring.

Splined on the driven shaft I1 adjacent the gear 20 is a movable clutch element 28 having a key '29 for registration with the keyway I8 in the shaft^|1 so that said driven shaft and movable clutch element. revolve together and the latter is slidable longitudinally of` the shaft. 'This movable clutch element has a peripheral groove 3II` and includes radial `arrns 3l..` The peripheral.groovev 30and a angles siib-V 10 stantiallyl horizontal arm 3'l'which', when the parts are assembled, overlies an outside surface K of the gear box. The rocking lever is provided with a concave bearing surface 38 that engagesgs a curved fulcrum 39 on the inner wall of a notch in a wall of the gear box in whiclraportiforrof" the depending arm of the rock-ing; lever. is .positioned.

To the free end of the arm 31 is pivoted'A cam lever 40 the camportionoiwhich coacts with a surf-aceof. the gearvboxrto; swing? the: yoke and shift the movable clutchielement.. towards thegear.' 2,0.`

As iuustrated in Fig. 1 the..'cam.1eve.r. 4ms.

positionedto 'disengagefitsfinner ends orthe high part of: they cam from,tlfiev.geaarobcnc.` surfacevand the action ofiV the .springe 32fwi1llretract :tlsiefzrnov-,w` able clutch element and the driven mechanism,- will stopor: remainstatienary. By.- moving the cam: lever.- 413 to-Ythe'-I opposite:5 position, as; shown in Fig. 2, the inner.- end'.V of; saidicarmlevenwill engage; the` gear box'surface.w and raiseethefouter end. of the.- arm. 3.11` ofi the rocb-inggleverz 33:- and: cause` the? yoke.l 3.5- to. slide-fthe: movable. clutchr. element-28: towards: the gear: Mhbringgone of: the'. armsy Sl'into the path-- ofi. travel oithe pin 25?:011: saidgearl 201; 'llhisLwill causerthe* movable' clutchy member.l Zfto. revolveiwitlr thefgearf20::andatransamit motion'. tothe driven shaft; mi

1f; auth@ time the mnvasiefciumh eiememisf actuated-f` foraconnecting'the driving and drivern mechanisms, an;A arm 3in should-1beiv ltr; alignment:

with'. thefpiny 25'. so^. astoz engage theaend ofthe device of this character capable of application to various classesof machinery for connecting the driving and driven mechanisms through speed reduction gearing.

Of course I do'not wish to be limited to the exact details of construction herein shown and described, as these may be varied within the scope of the appended claims without departing from the spirit of the invention.

Having described my-/inventi'en;. what I claim as'new and useflis:

1. A clutch comprising a gear adapted to be revolvably mounted on a driven shaft, a pin slid ably mounted on said gear, means to normally urge said pin longitudinally forwardly so that an endfthereof'iprojects beyond a face of the gear, amovable clutchelement adapted to be splined to the driven shaft and provided with radial arms atoenga'ge the pin sidewse for connecting the movable 'clutch element .and..gear, said: pinbeing pushed lbaek. when, engaged. endwise, means to, urge the, movable :clutch .element @may fllovmxthef. gear, and means to shift said movable clutch.. element towardssaidgear.

2.. Therclutch setforthinclaimd Whereirr,theaA means. to Vurge the. p in.` forwardly` ia` an:- arcuate flat spring .having one end anchored to. lthe-y gea-1.1` and the other end:xed.ltof the-pini.

g 3. The combination otafgear; box-iin'cludinga.- body open.. atone end, a4 curved, fulcrum.; formed:

onyan edge of. the openfend of said body, ,a cover: to close.- saidlopen end, a driven shaftrpassrwc throughsaidgearbox, a gear. revolvablmmountcd! `on said shaft, a spring pressed carricda saidvgear,l a movableclutch;` elementspli-nedfon said drivenf shaft. for.l engagement with: the; pin.. means to urge: said movable clutchneiementzawazy" fromthe gear,- andiafshiitingtmeansftos'slidea ther` o, movable. clutch element, towards-z the: gear,. sardi shifting means comprisingya: rocliingzlever: imA cludingia dependingfann;having:I ai ccncaveekiear.-

ingi surfacev to swingl onf the4 fnlcrumc. af. yenes atthe'v innerv end` of the depending: armi ande'. coactfa latter;` said pint will. .be' forcedfzonn of: their Wayw45u ingf withV movablev clutchf. element;y another* arml against'- the action@ on its spring 26m until such contacting arm' 3l. cani. pass oven thecpins.' At'. thisV time'y the pin will be ireturnecr to; its normal positionI int the patri.: of.' travel: ci; the following:

arrnzl'.Y y

Eiom.'the'l foregoing ittwilli be". apparent? thatfv I haveiprcvided: an exceedinglyvsirnple andeectivefg.

* surfaceI of `the-- gear box. to swingv the rocking' lever in: one direction.

y y WARE B. I-FAUSMAIN? 

